If Na2CO3 and CaCl2. are combined, one of the resulting compounds is CaCO3. Looking at the ions that are present, identify the other compound that will result from this reaction. Remember that the metal is written first.

Which process does not require the presence of a physical substance in order to transfer heat? air in the atmosphere is heated by the ground. this warm air then rises, and cooler air falls. this is an example of what type of process? how is conduction different from radiation?